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3.3
Components of the product
What ships with the SCALANCE S?
● SCALANCE S device
● 2-pin plug-in terminal block (signaling contact)
● 4-pin plug-in terminal block (power supply)
● Information on the product
● DVD with the following content:
– Manual
– Security Configuration Tool configuration software
3.4
Power supply
Use safety extra-low voltage only
The SCALANCE S device is designed for operation with safety extra-low voltage. This
means that only safety extra-low voltages (SELV) complying with IEC950/EN60950/
VDE0805 can be connected to the power supply terminals.
The power supply unit to supply the SCALANCE S must comply with NEC Class 2 (voltage
range 19.2 - 28.8 V).
The device may only be supplied by a power unit that meets the requirements of class 2 for
power supply units of the "National Electrical Code, Table 11 (b)". If the device is connected
to a redundant power supply (two separate power supplies), both must meet these
requirements.
Note
Never connect the SCALANCE S to AC voltage or to DC voltage higher than 28.8 VDC.
The power supply is connected using a 4-pin plug-in terminal block. The power supply can
be connected redundantly. Both inputs are isolated. There is no distribution of load. When a
redundant power supply is used, the power supply unit with the higher output voltage
supplies the SCALANCE S alone. The power supply is connected over a high resistance
with the enclosure to allow an ungrounded set up.
SCALANCE S
Commissioning and Hardware Installation Manual, 05/2016, C79000-G8976-C266-06
WARNING
Description
3.3 Components of the product
17
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